Slotting-cutter.



R. T. HAZELTON & W. H. VOCKELL.

SLOTTING CUTTER.

APPLICATION FILED MAY 22. l9l5.

Patented Dec. 18, 1917.

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RMTHa UNITED STATES; Parana ornron.

ROBERT 'I'. HAZELTON AND WILLIAM H. VOCKELL, 0F CINCINNATI, OHIO, ASSIGNORS TO THE CINCINNATI MILLING MACHINE BATION OF OHIO.

COMPANY. OF CINCINNATI, OHIO, A CORPO- SLOTTING-CUTTER.

Specification of Letters Patent.

Patented Dec. 18, 1917.

Application filed May 22, 1915. Serial No. 29,709.

To all whom it may concern:

Be it known that we, ROBERT T. HAzEnroN and VILLIAM H. VOCKELL, citizens of the United States, and residing at Cincinnati, in the county of Hamilton and State of Ohio,

have invented a new and Improved Slotting- Cutter, of which the following specification is a full disclosure.

This invention relates to rotary cutters of a relatively heavy or massive construction, constituting a so-called milling cutter, and it deals more especially with a rotary dualfaced cutter applicable more especially for cutting slots by a straight-away operation.

Among objects of this invention may be enumerated(A) to provide an inserted tooth construction which will embody all or many of the features of conventional cutters; (B) to provide for the employment of lengths of stock bar material for constituting the inserted teeth; (C) to provide for a rear bracing or reinforcement of the rojecting portions of the inserted teeth; and (D) to provide a very simple yet positive and efiicient interlocking arrangement whereby the various teeth may be adjusted for wear and fixed effectively in position.

Other objects will be in part obvious from the annexed drawings and in part indicated in connection therewith by the following analysis of this invention.

This invention accordingly consists in the features of construction, combination of parts and in the unique relations of the members and in the relative proportioning and disposition thereof; all as more completely outlined herein.

To enable others skilled in the art so fully to comprehend the underlying features thereof that they may embody the same by the numerous modifications in structure and relation contemplated by this invention, drawings depicting a preferred form have been annexed, as a part of this disclosure,-

inserted teeth in place. Fig. 4 is a side elevation, partly in section, of the milling cutter shown by Fig. 1. Fig. 5 is aperspective of a. detached isolated insertible tooth. Fig. 6 is a perspective of an isolated tooth retainmg, tapering, interlocking wedge or cotter.

The construction embodies a body or holder portion A, preferably made of onepiece suitably contoured and having the usual arbor aperture and key-way whereby it may be secured to a rotary spindle. This holder or body A provides a series of symmetrically arranged sockets 6, 7, 8, 9, etc.; the sockets 6 and 8 having their inner ends terminating at one side of the median plane of the cutter andthe sockets 7 and 9 having their narrow ends terminating at the other side of said plane, and these sockets preferably having their outer ends terminating more or, less approximately in circumferential alinement as shown best by Figs. 2 and 4. These sockets also extend at an angle to the radial or axial plane of the cutter as shown best by Fig. 1. Rearward of the outer ends of each socket, there is an upstanding lug or projection 10, which is preferably integral with the body portion A, and which is formed to back or reinforce the teeth as shown.

The teeth are preferably made from short lengths of round stock, and in a preferred embodiment of this invention are fashioned as shown by Fig. 5 to provide a flat face 11 adapted to co-act with a fiat sided taper pin or cotter whereby the tooth may be retained rigidly in place.

As a further refinement this invention preferably provides the flat face 11 with a multiplicity of serrations 12 having their grooves or ridges extending in parallelism transversely to the longitudinal axis of the insertible tooth. This tooth B also has its outer extremity configurated to embody the various clearance angles already discussed and it is seated in the sockets 6, 7, etc., as shown by Figs. 1, 3 and 4. Extending transversely to each of the sockets 6, 7, etc., are sockets m, 11 2, etc., adapted to receive the locating pins C, which, in this instance, are shown cylindrical and of uniform size from end to end and are provided with inclined faces 2 wk :h are fluted or serrated parallel with the plane of the face t, as indicated by 13. When these pins are driven home, as indicated by Fig. 3, the serrations 12 and 13 interfit, and not only wedge the teeth B firmly in place, but also provide a positive means for preventing these teeth from slipping lengthwise of their sockets.

Without further analysis, the foregoing will so fully reveal the gist of this invention that others can by applying current knowledge readily adapt it for various applica tions Without omitting certain features that, from the standpoint of the prior art, fairly constitute essential characteristics of the generic or specific .aspects of this invention, and therefore such adaptations should and are intended to be comprehended within the meaning and range of equivalency of the following claims.

Having thus revealed this invention, we claim as new and desire to secure the following combinations of steps and elements, or equivalents thereof, by Letters Patent of the United States 1. A milling cutter combining a body portion having a plurality of outwardly extending sockets, an insertible tooth arranged in each socket and providing serrations extending transversely to its length; and a locating pin having a serrated face extending at an angle and adapted to be wedged transversely to one of said insertible teeth to hold the same against longitudinal displacement.

2. A metal-cutting tool combining an insertible cutter; a holder thereforhaving a socket conforming to and adapted to receive the shank portion of said cutter, said holder also having a cylindric socket extending transversely to and intersecting said shank-receiving socket; and a substantially cylindric cotter adapted to go into said cylindric socket to engage said shank portion, said cotter having a plurality of closely related ribs extending at a slight angle to its longitudinal axis, and said shank portion having a series of ribs similar to those of said cotter and extending at an angle to the axis of said shank portion, said ribs of said cotter being adapted to move endwise into.

cooperative interlocking relation with some of said ribs of said shank portion.

3. A milling cutter combining a bodyportion having a plurality of sockets extending outwardly and arranged in staggered relation with their inner ends alternately on opposite sides of the central plane and their outer ends cut by said plane; and a tooth inserted in each socket.

4. A milling cutter combining a body portion having a plurality of staggered outlocated in the other socket and also having a flattened face having serrations inclined at an angle to the axis of the pin.

6. A metal-cutting-tool combining a body portion providing two sockets intersecting in offset relation with one another; an insertible tooth located in one of said sockets and having a flattened face provided with serrations extending transversely to its 1011- gitudinal axis; and a pin located in the other socket and also having a flattened face extendin longitudinally at a sli ht angle with t 1e axis of said pin, said f hce being provided with longitudinal serrations adapted to interlock with the transverse serra tions of said insertible tooth.

7. In combination, a metal-cutting tool having a shank-portion, a holder therefor having a socket conforming to and adapted .to receive said shank portion, said holder having a cylindric socket extending substantially at right angles to, and intersecting, said shank-receiving socket, and a substantially cylindric cotter adapted to go into said cylindric socket and engage said shankportion, said cotter having a plurality of closely related ribs extending at a slight angle to its axis, and said shank-portion having a series of ribs similar to those of said cotter and extending substantially at right angles to the axis of said shank-portion, said ribs of said cotter being adapted to mov endwise into cooperative interlocking relation with some of said ribs of said shank-portion.

In witness whereof, we hereunto sub scribe our names as attested by the two subscribing Witnesses.

lVitnesses SoL. EINSTEIN, H. S. WILLIAMS. 

